Yuko, who leads a double life as a gentle mother of one and a top-notch investigator. To complete the mission of capturing the culprit who stole highly classified data, she infiltrates the enemy hideout alone. However, she is overpowered by the criminal's henchmen and subjected to brutal assault — the boss forces her while squeezing out her breast milk and violently rapes her. What will become of the fate of this expert breast-milk investigator!?